<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>首页</title>
</head>
<body>
    <h1>希望服务器推送消息给我</h1>
    <script>
        // html5 原生支持webSocket协议
        var ws = new WebSocket('ws://localhost:8072');
        //onopen 事件 open连接
        ws.onopen = function(){
            console.log('ws onopen');
            ws.send('from client :hello')
        }
        ws.onmessage = function(e){
            console.log('ws onmessage');
            console.log('from server:'+e.data);
        }
    </script>
</body>
</html>